In the new film, actor Josh Brolin ("Sin City: A Dame To Kill For") voices the character 'Thanos'.
Thanos debuted in Marvel Comics' "Iron Man" #55 (Feb. 1973), created by writer-artist Jim Starlin.
The character has since appeared in over 30 years of Marvel Comics continuity as well as in a dedicated, self-titled series.
Thanos was born on Titan, a moon of the planet Saturn, to 'Mentor' and 'Sui-San'. Due to a genetic quirk, Thanos is born with the 'Deviant' gene and as such resembles the 'Deviants' — the cousin race of the 'Eternals' — more than his own people.
Maturing to adulthood, and via the use of bionics and mysticism, Thanos augments his abilities to become the most powerful of the Titanian-born Eternals, and is often referred to as the 'Mad Titan'.
Bitter at being an outsider, Thanos becomes fascinated with nihilism and begins a nuclear bombardment of Titan that kills millions, before traveling to Earth.
Through a combination of his mutant Eternal heritage, bionic amplification and mysticism, Thanos is capable of superhuman strength, stamina and durability, also able to absorb and project vast quantities of cosmic energy, enough to obliterate planets.
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Marvel Select "THANOS" Action Figure:
"...with 14 points of articulation, the 'Thanos Marvel Select' Action Figure is a finely detailed representation of the comic book villain, complete with a removable 'Infinity Gauntlet'. Thanos is perhaps best known for his lust and desire to please his dark mistress, the human embodiment of Death. In her name, he has destroyed countless worlds. With the cosmically charged Infinity Gauntlet in his grasp, Thanos nearly wiped out every living being in the universe, and would have succeeded if not for the intervention of Marvel's superheroes. One of the vastly powerful 'Eternals' of 'Titan', Thanos was shunned as a child for his gigantic form and grotesque appearance. Wandering the galaxy, he assembled a small army of soldiers, mercenaries and malcontents..."